On what is to my mind one of the best balanced motorcycles of all: A Yamaha SR250. Hundreds of pharmacy deliverymen can't be wrong. It's 240cc mill is almost bulletproof, and frugal as hell, while still being torquey enough to lug my overfed ass around at a swift 90km/h. At 35,000km, its already paid for itself in petrol savings!

Petrol savings:For those who enjoy an algebraic challenge -Suppose you buy a small motorcycle for Cm rand. You find that it consumes on average Vm liters of petrol per 100km. In contrast, your car consumes Vc liters per 100km. The fuel price is Cf per liter. How far do you have to ride your new bike before it has paid for its purchase price in fuel savings?